<?php

  /**
  * Feed controller is used to handle all feed related events - iCal, RSS etc
  *
  * @http://www.projectpier.org/
  */
  class FeedController extends PageController {
  
    /**
    * Construct the controller
    *
    * @param void
    * @return FeedController
    */
    function __construct() {
      parent::__construct();
      $this->setLayout('xml'); // default layout for this controller
    } // __construct
    
    // ---------------------------------------------------
    //  RSS
    // ---------------------------------------------------
    
    /**
    * List recent activities
    * 
    * This page will list recent activities. If project_id variable is present in get recent activities will be listed 
    * for that specific project. If that value is missing global activities will be listed
    *
    * @param void
    * @return null
    */
    function recent_activities() {
      $this->setLayout('xml');
      
      $logout_after = false;
      $cw =& CompanyWebsite::instance();
      if (!$cw->getLoggedUser()) {
        // not logged in, remember to logout later
        $logout_after = true;
      }
      $logged_user = $this->loginUserByToken();

      $active_projects = $logged_user->getActiveProjects();
      $activity_log = null;
      if (is_array($active_projects) && count($active_projects)) {
        $include_private = $logged_user->isMemberOfOwnerCompany();
        $include_silent = $logged_user->isAdministrator();
        
        $project_ids = array();
        if (isset($_GET['project_id'])) {
          $project_ids[] = (integer) array_var($_GET, 'project_id');
        } else {
          foreach ($active_projects as $active_project) {
            $project_ids[] = $active_project->getId();
          } // foreach
        } // if
        
        $activity_log = ApplicationLogs::getOverallLogs($include_private, $include_silent, $project_ids, config_option('feed_logs_count', 50));
      } // if
      
      $feed = new Angie_Feed(lang('recent activities feed'), undo_htmlspecialchars(ROOT_URL));
      $feed = $this->populateFeedFromLog($feed, $activity_log);
      
      if ($logout_after) {
        $cw->logUserOut();
      }
      
      $this->renderText($feed->renderRSS2(), true);
    } // recent_activities
    
    /**
    * List project activities as a RSS feed
    *
    * @param void
    * @return null
    */
    function project_activities() {
      $this->setLayout('xml');
      
      $logged_user = $this->loginUserByToken();
      if (!($logged_user instanceof User)) {
        header("HTTP/1.0 404 Not Found");
        session_write_close();
        die();
      } // if
      
      $project = Projects::findById(array_var($_GET, 'project'));
      if (!($project instanceof Project)) {
        header("HTTP/1.0 404 Not Found");
        session_write_close();
        die();
      } // if
      
      if (!$logged_user->isProjectUser($project)) {
        header("HTTP/1.0 404 Not Found");
        session_write_close();
        die();
      } // if
      
      $include_private = $logged_user->isMemberOfOwnerCompany();
      $include_silent = $logged_user->isAdministrator();
      
      $activity_log = ApplicationLogs::getOverallLogs($include_private, $include_silent, array($project->getId()), config_option('feed_logs_count', 50));
      $feed = new Angie_Feed(lang('recent project activities feed', $project->getName()), undo_htmlspecialchars($project->getOverviewUrl()));
      $feed = $this->populateFeedFromLog($feed, $activity_log);
      
      $this->renderText($feed->renderRSS2(), true);
    } // project_activities
    
    // ---------------------------------------------------
    //  Calendar
    // ---------------------------------------------------
    
    /**
    * Show iCalendar for specific user
    *
    * @param void
    * @return null
    */
    function user_ical() {
      $this->setLayout('ical');
      
      $user = $this->loginUserByToken();
      if (!($user instanceof User)) {
        header('HTTP/1.0 404 Not Found');
        session_write_close();
        die();
      } // if
      
      $this->renderCalendar($user, lang('user calendar', $user->getDisplayName()), $user->getActiveMilestones(), $user->getActiveProjects());

    } // user_ical
    
    /**
    * Show calendar for specific project
    *
    * @param void
    * @return null
    */
    function project_ical() {
      $this->setLayout('ical');
      
      $user = $this->loginUserByToken();
      if (!($user instanceof User)) {
        header('HTTP/1.0 404 Not Found');
        session_write_close();
        die();
      } // if
      
      $project = Projects::findById(array_var($_GET, 'project'));
      if (!($project instanceof Project)) {
        header('HTTP/1.0 404 Not Found');
        session_write_close();
        die();
      } // if
      
      if (!$user->isProjectUser($project)) {
        header('HTTP/1.0 404 Not Found');
        session_write_close();
        die();
      } // if
      
      $this->renderCalendar($user, lang('project calendar', $project->getName()), ProjectMilestones::getActiveMilestonesByUserAndProject($user, $project), array( $project ));
    } // project_ical
    
    /**
    * Render icalendar from milestones
    *
    * @param string $calendar_name
    * @param array $milestones
    * @return null
    */
    private function renderCalendar(User $user, $calendar_name, $milestones, $user_active_projects) {
      $calendar = new iCalendar_Calendar();
      $calendar->setPropertyValue('VERSION', '2.0');
      $calendar->setPropertyValue('PRODID', '-//Apple Computer\, Inc//iCal 1.5//EN');
      $calendar->setPropertyValue('X-WR-CALNAME', $calendar_name);
      $calendar->setPropertyValue('X-WR-TIMEZONE', 'GMT');

      if (is_array($user_active_projects)) {
        foreach($user_active_projects as $project) {
          $assigned_tasks = $project->getUsersTasks(logged_user());
          if(is_array($assigned_tasks)) {
            foreach($assigned_tasks as $task) {
              $todo = new iCalendar_Todo();		   
              $todo->setPropertyValue('SUMMARY', $project->getName().": ".$task->getText()); 
              $todo->setPropertyValue('UID', 'TASK'.$task->getId());
              $date = $task->getDueDate();
              if (!is_null($date)) {
                $todo->setPropertyValue('DTSTART', $date->format('Ymd'), array('VALUE' => 'DATE'));
              }
              $priority = $task->getTaskList()->getPriority();
              $priority = $priority ? $priority : 1;
              $todo->setPropertyValue('PRIORITY', $priority);
              $todo->setPropertyValue('STATUS', "NEEDS-ACTION");
              $todo->setPropertyValue('URL', externalUrl($task->getCompleteUrl()));
              $calendar->addComponent($todo);
            }
          }
        }
      }      
      if (is_array($milestones)) {
        foreach ($milestones as $milestone) {
          if (!$user->isMemberOfOwnerCompany() && $milestone->isPrivate()) {
            continue; // hide private milestone
          }
          
          if (!$milestone->isCompleted()) {
            $event = new iCalendar_Event();
            
            $date = $milestone->getDueDate();
            $event->setPropertyValue('DTSTART', $date->format('Ymd'), array('VALUE' => 'DATE'));
            $date->advance(24 * 60 * 60);
            $event->setPropertyValue('DTEND', $date->format('Ymd'), array('VALUE' => 'DATE'));
            $event->setPropertyValue('UID', 'MILESTONE'.$milestone->getId());
            $event->setPropertyValue('SUMMARY', $milestone->getName() . ' (' . $milestone->getProject()->getName() . ')');
            $event->setPropertyValue('DESCRIPTION', $desc = $milestone->getDescription());
            $event->setPropertyValue('URL', externalUrl($milestone->getViewUrl()));
            /* pre_var_dump($desc); */
            
            $calendar->addComponent($event);
          } // if
        } // foreach
      } // if
      
      header('Content-Disposition: inline; filename=calendar.ics');
      $this->renderText(iCalendar::render($calendar), true);
      session_write_close();
      die();
    } // renderCalendar
    
    // ---------------------------------------------------
    //  Util methods
    // ---------------------------------------------------
    
    /**
    * Populate feed object with activity log entries
    *
    * @param Angie_Feed
    * @param array $activity_log
    * @return Angie_Feed
    */
    private function populateFeedFromLog(Angie_Feed $feed, $activity_log) {
      $this->addHelper('textile');  
      if (is_array($activity_log)) {
        foreach ($activity_log as $activity_log_entry) {
          tpl_assign('object', $activity_log_entry->getObject());
          if ($activity_log_entry->getObject()) {
            $object_type = str_replace(" ", "_", strtolower($activity_log_entry->getObject()->getObjectTypeName()));
            if (file_exists(get_template_path('render_'.$object_type, 'feed'))) {
              $description = tpl_fetch(get_template_path('render_'.$object_type, 'feed'));
            } else {
              $description = tpl_fetch(get_template_path('render_object', 'feed'));
            }
          }
          $item = $feed->addItem(new Angie_Feed_Item($activity_log_entry->getText(), undo_htmlspecialchars($activity_log_entry->getObjectUrl()), $description, $activity_log_entry->getCreatedOn()));
          $taken_by = $activity_log_entry->getTakenBy();
          if ($taken_by instanceof User) {
            $item->setAuthor(new Angie_Feed_Author($taken_by->getDisplayName(), $taken_by->getEmail()));
          } // if
        } // foreach
      } // if
      
      return $feed;
    } // populateFeedFromLog
    
    /**
    * Log user by token and ID provided through GET method
    *
    * @param void
    * @return User
    */
    private function loginUserByToken() {
      $user = Users::findById(array_var($_GET, 'id'));
      if (!($user instanceof User)) {
        header("HTTP/1.0 404 Not Found");
        session_write_close();
        die();
      } // if
      
      if (!$user->isValidToken(array_var($_GET, 'token'))) {
        header("HTTP/1.0 404 Not Found");
        session_write_close();
        die();
      } // if
      
      CompanyWebsite::instance()->setLoggedUser($user, false, false, false);
      return $user;
    } // loginUserByToken
  
  } // FeedController

?>
